已知K时，Ba+·aq和SO·aq的标准摩尔生成焓为－.kJ·mol和－.kJ·mol，反应：BaCl·aq+NaSO·aq==BaSO(s)+NaCl·aq的标准摩尔焓变是－.kJ·mol，计算得BaSO(s)的标准摩尔生成焓为A－.kJ·molB.kJ·molC.kJ·molD－.kJ·mol